Understanding alignment

Hello everyone.
I am ignorant on this subject and have tried to look for information online, but sometimes the comments and information contradict each other. If I have this alignment and I want the Camber to be set to 0, would the Caster movement push the tire towards the front of the vehicle or towards the firewall? Which way does the caster go up or down?

 

Positive caster is when it's tilted forward like the front fork on a bicycle (leading)

Negative caster is when it tilts backward like a shopping cart wheel (following)

 

As you increase caster with tacoma, you increase camber, its just how it works. So most make a compromise.

Toyota runs slightly positive camber and fairly low caster. So we always tell the customer to sacrifice a bit of camber wear for better ride.

Ideally with tacoma you want 2 degrees of caster or more, and less than 1 degree of camber.